Final answer:
Marge will have $824 at the end of the first year, as the simple interest calculation is $800 * (1 + 0.03), which equates to $824.
Step-by-step explanation:
Marge puts $800 into a bank account that earns 3% annual interest. To calculate the total amount she will have at the end of the first year, we can use the formula for simple interest, which is Principal * (1 + Rate). Since she is not adding to the money or compounding the interest, the calculation is straightforward:
$800 * (1 + 0.03) = $800 * 1.03 = $824
Therefore, at the end of the first year, Marge will have $824 in her account, making option c the correct answer.